If I were you I wouldn't even waste my time on one right now. They usually work best starting around week 20. There's no guarantee that they will work this early on. Trust me, I've looked in this quite a bit and I wanted one so bad, but I've decided to hold my breathe...not worry...and wait.

I just got mine in the mail from Ebay on Tuesday. It cost me 35 dollars, not bad for peace of mind. I'm just as 9 weeks and we were able to pick up a faint h/b, they don't use them in the office until about 12 weeks since you aren't likely to hear anything before then... We just got lucky.

My two year old thinks Darth Vader is in my tummy since the swishy sound of the heart beat sounds like Vader's breathing, I guess lol.